Mainboard for Flex 5 15ALC05 — Part No. 203021-1 / 5B21B85038

Replacement main board compatible with Flex 5 15ALC05, carrying the exact part numbers 203021-1 and 5B21B85038. Designed as a direct-fit swap for the original motherboard, preserving the factory connectors and layout. Confirm your laptop model matches Flex 5 15ALC05 before ordering. Professional installation is recommended to ensure correct setup.